Alignment of the detector

The detector is mounted on an x/y/z micrometer stage below the chamber. The micrometer stage is connected to a platform in the vacuum chamber by three bellows. A set of springs between the bottom of the vacuum chamber and the micrometer stage balances the vacuum force onto the bellows. One extension spring pulls the micrometer stage in positive x direction to overcome the stiffness of the bellows.

The x-ray detector sits on an in-vacuum x and a z slide which are mounted on the micrometer platform. This allows to move it in and out of the beam. Inboard of the x-ray detector, a 5$\times$ VL lens is mounted which can be brought on the beam axis with the x slide. Inboard of the lens, a phosphor screen is (should be) mounted.

Use the alignment telescope to convince yourself that there is no obstacle in the way of the beam. Move sample, ZP and OSA out of the way.

Before adjusting the detector, convince yourself that you have beam. For that purpose bring the phosphor screen into place. If you cannot capture beam on the phosphor, check for beam on the monitor and on the entrance window. If you get beam onto the entrance window, there might be an obstacle in the chamber.

Bring the detector into position by moving it with the wobble stick inboard, and then upstream onto its seat. The z slide is spring loaded and will press the detector in the forward position.

Switch on the detector. Make sure you have a TTL signal on the rate meter. Start moving the detector systematically in x and y with the micrometer stage until you can detect beam. Optimize the detector position. Write micrometer readings (x, y AND z!) into the logbook.